CN115498689A - Distributed power supply access point power quality assessment system - Google Patents
Distributed power supply access point power quality assessment system Download PDFInfo
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- CN115498689A CN115498689A CN202211194674.0A CN202211194674A CN115498689A CN 115498689 A CN115498689 A CN 115498689A CN 202211194674 A CN202211194674 A CN 202211194674A CN 115498689 A CN115498689 A CN 115498689A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/40—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
Abstract
The invention discloses a distributed power supply access point electric energy quality evaluation system which comprises a distributed power supply module, wherein the distributed power supply module is connected with a new energy detection module, an application module, a grid connection detection module and a scheduling regulation and control module, the grid connection detection module and the scheduling regulation and control module are jointly connected with a bus voltage detection sensor module, the bus voltage detection sensor module is connected with a distributed power supply grid connection module, and the distributed power supply grid connection module is connected with a power grid module. The invention can be well suitable for various distributed power supply equipment, has wide application range, and can well detect the quality of the electric energy supplied by the distributed power supply through the matching of various units in the electric energy quality monitoring unit, thereby ensuring that the quality meets the requirements, ensuring the grid-connected effect, better providing stable electric power service for power consumers, better ensuring the anti-interference capability of electric appliances of the power consumers and ensuring the normal use of the electric equipment.
Description
Technical Field
The invention relates to the technical field of power quality, in particular to a distributed power supply access point power quality evaluation system.
Background
Distributed power systems refer to smaller generator sets, typically less than 30 megawatts, deployed at or near customer sites to meet the needs of a particular customer, to support the economic operation of an existing power distribution grid, or both. Reliability and power quality of service is improved due to the proximity to the user. The combined action of the development of technology, public environmental policy, expansion of the power market and other factors makes distributed power generation an important energy source choice in the new century.
The distributed power system has the following advantages: 1. all power stations in the distributed power generation system are independent of each other, and users can control the power generation system by themselves, so that large-scale power failure accidents cannot happen, and the safety and reliability are high; 2. distributed power generation can make up for the lack of safety and stability of a large power grid, and power supply is continued when an unexpected disaster occurs, so that the distributed power generation becomes an important supplement of a centralized power supply mode; 3. the peak regulation performance is good, the operation is simple, and the full automation is convenient to realize due to the fact that the number of the systems participating in the operation is small, the starting and the stopping are rapid.
Due to the intermittent and fluctuating properties of the distributed power system, the power quality of a distributed power access point is evaluated when the distributed power system provides power for a power distribution network, and the power quality is generally evaluated by accessing power quality detection equipment in the prior art, so that the grid connection of the distributed power system is conveniently detected according to the power quality of the distributed power system, the stability of the grid connection power quality is ensured, and the service is better provided for users.
For example, patent publication No. CN113381450A discloses a power quality evaluation system for a distributed power access point and an evaluation control method thereof. The method belongs to the technical field of distributed power supply access point power quality evaluation. The system comprises a power distribution network, a micro-grid and a power grid power quality monitoring platform, wherein a bus voltage detection sensor capable of detecting bus voltage and a first power detector capable of detecting the power on a bus are respectively arranged on the bus of the power distribution network; the micro-grid comprises a plurality of wind driven generators, a power output end of each wind driven generator is respectively provided with a power detector for detecting the output power of the wind driven generator, each wind driven generator is also respectively provided with an intelligent air inducing device with adjustable blowing wind power, and the rear end of the intelligent air inducing device is fixed on a frame of the wind driven generator; and the control ends of the master voltage detection sensor, the first power detector, the second power detector and the intelligent induced draft device are respectively connected with the power quality monitoring platform of the power grid.
However, the patent is only directed to the wind power generation, and is not applicable to other distributed power supply systems, the existing distributed power supplies are various in variety, different energies of the distributed power supplies have different properties due to wide energy sources, for example, solar energy, the required illumination conditions are complex, and the distributed power supplies are related to meteorological conditions such as four seasons, day and night, cloudy and clear, and surrounding sand and dust environments, and meanwhile, when the solar energy does not generate electricity, the normal operation of equipment is ensured through self-stored electric energy or power grid connection, and under the condition of power generation, according to different illumination conditions, the more the current generated by a photovoltaic panel is increased, the more the electricity is generated, similar problems also exist in the wind power generation equipment, the magnitude of the wind power directly influences the magnitude of the output voltage, so that in the prior art, the distributed power supplies of different types need to be provided with appropriate electric energy quality detection equipment according to the self conditions, and how an electric energy quality evaluation system can better adapt to various distributed power supplies is a problem in the field.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a distributed power supply access point power quality evaluation system to solve the problems.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a distributed power supply access point electric energy quality evaluation system comprises a distributed power supply module, wherein a new energy detection module, an application module, a grid-connected detection module and a scheduling regulation and control module are connected to the distributed power supply module;
the grid-connected point detection module is connected with a grid-connected point module, and the grid-connected point module is electrically connected with an electric energy quality monitoring unit, a grid-connected point frequency unit, a grid-connected point active power unit, a grid-connected point voltage and current unit, a grid-connected point state unit and a grid-connected point overload state data unit;
the power quality monitoring unit comprises a voltage deviation detection unit, a voltage fluctuation and flicker unit, a harmonic detection unit, a three-item unbalance detection unit and a temporary overvoltage and transient overvoltage detection unit.
Preferably, the grid-connected point state unit comprises a grid-connected point accident state unit and a grid-connected point maintenance state unit, so that the operation condition of the grid-connected equipment can be better known.
Preferably, the new energy detection module comprises a power generation system summation unit, a power generation map unit and a power generation summary table unit, wherein the power generation system summation unit is used for performing summation display on all distributed power supplies in an area; the power generation geographic map unit is used for marking the positions of all distributed power supplies in operation or planning on a local map; and the power generation summary table unit is used for generating a summary table of all distributed power supply data in the region.
Preferably, the application module comprises a load prediction module, a power generation prediction module, a feeder automation unit, an automatic voltage reactive power control unit, an economic operation control unit and a distributed power supply group control unit, and the load prediction module is used for realizing the trend prediction of the load of the distributed power supply in the region; the power generation prediction unit is used for realizing trend prediction of the power generation amount of the distributed power supply in the region; the feeder automation unit is used for realizing the feeder automation of a grid-connected point of the distributed power supply in the region; the automatic voltage reactive power control unit is used for realizing automatic voltage reactive power control of various types of distributed power supplies in the region; the economic operation control unit is used for realizing economic operation of grid-connected points of distributed power supplies in an area; the distributed power source group control unit is used for realizing the collective control of all distributed power sources in the area, can better understand and predict the operation condition of the distributed power source equipment, and is convenient for workers to control the distributed power source equipment.
Preferably, the distributed power supply module is further connected with a field detection module, and the field detection module comprises an environment monitoring module and a monitor module, so that the operation condition of the distributed power supply equipment can be better known, and data can be conveniently provided for predicting the generated energy.
Preferably, the environment monitoring module comprises a temperature sensor, a humidity sensor, a wind sensor and an illumination sensor, and can monitor the surrounding environment condition of the power generation equipment more fully so as to predict the power generation condition.
Preferably, the distributed power supply module is a solar power generation device, a natural gas power generation device, a biomass power generation device, a wind power generation device, a geothermal power generation device, an ocean power generation device or a resource comprehensive utilization power generation device.
Preferably, the power generation equipment for comprehensive utilization of resources is coal mine power generation equipment or gas power generation equipment.
Preferably, the distributed power supply module is further connected with a power detector, so that the power of each distributed power generation device can be rapidly detected, the current and voltage conditions generated by the power generation devices can be timely determined, the detection devices can be timely adjusted, the monitoring devices can be better protected, the service life of the monitoring devices can be prolonged, the power generation conditions can be accurately known, and the quality of grid-connected power supply can be known.
Preferably, an electric energy quality detector is further installed on the distributed power supply grid connection module, so that the grid connection electric energy condition can be better detected.
Compared with the prior art, the invention has the beneficial effects that: the distributed power supply control system can conveniently and rapidly realize the control of the distributed power supply connected to the existing power grid through the cooperation of the distributed power supply module, the new energy detection module, the application module, the grid connection detection module and each unit in the scheduling regulation module, realize the integration of the distribution information of the distributed power supply, eliminate information islands, achieve the intelligent integration and sharing of the distributed power supply application, and simultaneously, realize the cooperation with each unit in the power quality monitoring unit, can well detect the voltage deviation, the voltage fluctuation and the flicker, the harmonic waves, the three unbalance degrees, the temporary overvoltage and the transient overvoltage of the power provided by the distributed power supply, can well know the quality of the power provided by the distributed power supply, judge whether the power supply can be connected to the grid or not, thereby ensuring the stability of the power quality of the power grid, conveniently providing stable power for power consumers, and ensuring the operation effect of electric equipment of the power consumers.
Through the new energy detection module, the application module, the scheduling regulation and control module and the cooperation of various units in the new energy detection module, the application module and the scheduling regulation and control module, the position of the distributed power source in the region and the power generation condition of the distributed power source can be well known, the power generation condition of the distributed power source can be effectively predicted, and the new energy detection module, the application module, the scheduling regulation and control module and the power generation condition of the distributed power source can be well allocated according to the power generation condition, so that stable power service can be provided for power consumers.
Through the cooperation of various units in the grid-connected detection module, the grid-connected point can be well detected, the running condition of the grid-connected point is known, and the grid-connected power supply condition of the grid-connected point is judged, so that stable power service can be better provided for power consumers.
Through the cooperation of multiple unit in the electric energy quality monitoring unit, the quality to the electric energy that distributed generator supplied with can be fine detects, can be through new forms of energy detection module, application module, on-the-spot detection module, power detector and the condition of being incorporated into the power networks detection module come fine understanding distributed generator all ring edge borders, thereby can prejudge distributed generator power generation situation, be convenient for adjust the subassembly for the monitoring, thereby the electric power and the voltage condition of adaptation distributed generator output that can be fine, better protection monitoring facilities, prolong its life and accurately understand the power generation condition, understand the quality of being incorporated into the power networks the power supply, thereby guarantee that it accords with the regulation, guarantee the effect of being incorporated into the power networks, better for providing stable electric power service with the user, better assurance power consumer's interference killing feature, guarantee that the consumer can normally use.
In conclusion, the invention can be well adapted to various distributed power supply devices, has wide application range, and can well detect the quality of the electric energy supplied by the distributed power supply through the matching of various units in the electric energy quality monitoring unit, thereby ensuring that the quality meets the regulations, ensuring the grid-connected effect, better providing stable electric power service for power consumers, better ensuring the anti-interference capability of electric appliances of the power consumers and ensuring that the electric devices can be normally used.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a block diagram of the distributed power supply of the present invention;
FIG. 3 is a block diagram of a power quality monitoring unit according to the present invention;
FIG. 4 is a block diagram of an environment monitoring module according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The embodiment provides a technical scheme that: the invention relates to a distributed power supply access point electric energy quality evaluation system which comprises a distributed power supply module, wherein the distributed power supply refers to a power generation facility or an energy comprehensive step utilization multi-connection supply facility with electric power output, which is constructed and installed at or near a place where a user is located and has an operation mode that the user side is used for self-generation mainly, surplus electric quantity is on the internet, and the balance regulation of a power distribution network system is characterized, the distributed power supply module is a solar power generation device, a natural gas power generation device, a biomass power generation device, a wind power generation device, a geothermal energy power generation device, a marine power generation device or a resource comprehensive utilization power generation device, the resource comprehensive utilization power generation device comprises a coal mine and a gas power generation, the distributed power supply is generally installed close to a load and directly supplies power to the user, the most essential characteristic of the distributed power supply is suitable for nearby utilization of dispersed energy resources, the local consumption of electric energy is realized, the current generally does not exceed an upper-level transformer, and the installation scale of the distributed power supply module is small.
The distributed power supply module is connected with an on-site detection module, the on-site detection module comprises an environment monitoring module and a monitor module, and can well monitor the installation site of the distributed power supply and the distributed power supply equipment, the environment monitoring module comprises a power generation prediction unit for detecting the on-site environment such as temperature, humidity, wind power, illumination condition and the like and then transmitting the detected on-site environment to the application module, so that the power generation condition of solar power generation equipment, wind power generation equipment and the like which are greatly influenced by the environment in the new energy distributed power supply can be well predicted, the current and voltage change condition in a short period can be known, the regulation and control of the detection equipment can be conveniently carried out according to the predicted condition, and the current and voltage output by the distributed power supply can be better adapted; the monitor module can know the field situation, judge the detection accuracy of the detection sensor and conveniently know the actual field situation; the distributed power supply module is also connected with a power detector, so that the output power of the power output end of the distributed power supply can be well detected and is transmitted to the dispatching regulation and control module, the module can know the operation condition of the module, and the power regulation and control can be conveniently carried out according to the output power of the module.
The distributed power supply module is connected with a new energy detection module, an application module, a grid-connected detection module and a scheduling regulation and control module, so that electric energy generated by the distributed power supply can be well predicted and monitored, remote control by workers is facilitated, meanwhile, the workers can conveniently regulate and control power distribution according to the power generation condition of the distributed power supply, power supply is optimized, and normal power consumption of power consumers is better guaranteed; the utility model discloses a distributed power supply, including female voltage detection sensor module, distributed generator grid-connected module, power grid module, grid-connected detection module, frequency, active power, reactive power, voltage, electric current, accident state, maintenance state and overload state data, the operation state of each grid-connected point includes and is incorporated into the power networks and leave the net, can conveniently realize distributed generator's the control of inserting current electric wire netting fast, realizes distributed generator distribution information integration, eliminates information isolated island, reaches the intelligent integration and the share of distributed generator application.
The grid-connected detection module is connected with a grid-connected point module, can be fine detect grid-connected equipment, know the circumstances that grid-connected point electric power uploaded and the circumstances that grid-connected equipment operated, the last electric connection of grid-connected point module has electric energy quality monitoring unit, electric energy quality monitoring unit includes voltage deviation detecting element, voltage fluctuation and flicker unit, harmonic detecting element, three-phase unbalance degree detecting element, transient overvoltage and transient overvoltage detecting element.
The electric energy quality monitoring unit detects through an electric energy quality detector: after the voltage deviation detection unit detects the voltage deviation, whether the index is qualified is determined according to a voltage deviation standard in the national grid company power system voltage quality and reactive voltage management regulation issued in 2004, for example: the sum of the absolute values of the positive deviation and the negative deviation of the power supply voltage of 35kV and above does not exceed 10% of the rated voltage; the allowable deviation of the three-phase power supply voltage of 10kV and below is +/-7% of the rated voltage; the allowable deviation of 220V single-phase power supply voltage is-10% -7% of rated voltage; after the voltage fluctuation and flicker unit detects a long-time flicker value of a common connection point of the power system, whether the index is qualified is determined according to relevant standards in GB/T12326-2008 electric energy quality voltage fluctuation and flicker: the power system common connection point, the long-time (2 hours) flicker value P lt satisfies: @ 110kv, plt =0.1; plt =0.8 >110 kV; after the harmonic detection unit detects and calculates the total harmonic distortion rate, whether the index is qualified is determined according to relevant standards in GB/T14549-93 electric energy quality public power grid harmonic: the total harmonic distortion rate of the voltage (phase voltage) of each stage of the 6-220kV public power grid is as follows: 5% of 0.38kV, 4% of 6-10kV, 3% of 35-66kV and 2.0% of 110 kV; the allowable value of the harmonic current injected into the power grid by a user is to ensure that the harmonic voltage of each level of the power grid is within a limit value range, and the voltage harmonic distortion rate generated by each level of the power grid harmonic source is as follows: 2.6% of 0.38kV, 2.2% of 6-10kV, 1.9% of 35-66kV and 1.5% of 110 kV. The method is executed according to the standard of 110kV for a 220kV power grid and power users supplying power to the 220kV power grid; after the three-phase unbalance detection unit detects and calculates the voltage unbalance and the frequency deviation, whether the index is qualified is determined according to relevant standards in GB/T15543-2008 electric energy quality three-phase voltage unbalance: the allowable value of the normal voltage unbalance degree of the common connection point of the power system is 2%, and the allowable value of the normal voltage unbalance degree of the common connection point of the power system can not exceed 4% in a short time; for each user of the point of common connection, the allowable value of the voltage unbalance at the point is generally 1.3%, and must not exceed 2.6% for a short time, and the allowable value of the deviation of the normal frequency of the power system from the standard frequency of 50Hz is: +/-0.2 Hz, when the system capacity is extremely small, the deviation can be widened to +/-0.5 Hz, the standard does not indicate the limit of the system capacity, the power grid capacity is +/-0.2 Hz when the power grid capacity is 300 kilowatts or more, and the power grid capacity is +/-0.5 Hz when the power grid capacity is less than 300 kilowatts; after the temporary overvoltage and transient overvoltage detection unit detects the temporary overvoltage and transient overvoltage, whether the index is qualified is determined according to relevant standards in GB/T18481-2001 electric energy quality temporary overvoltage and transient overvoltage.
The electric energy quality detector is also installed on the distributed power supply grid-connected module, the electric energy quality detector can well detect that the distributed power supply provides an electric energy voltage deviation value, a power grid harmonic value, a three-phase voltage unbalance condition, voltage fluctuation and a flicker condition, the electric power supply condition of the distributed power supply can be well known, the detected value is compared with a specified value and a power grid operation value, the power supply condition of the distributed power supply is rapidly known, whether the distributed power supply can be connected to the grid or not is judged, and the grid-connected point equipment is rapidly controlled to control.
The grid-connected point module is also connected with a grid-connected point frequency unit, a grid-connected point active power unit, a grid-connected point voltage and current unit, a grid-connected point state unit and a grid-connected point overload state data unit, the grid-connected point state unit comprises a grid-connected point accident state unit and a grid-connected point maintenance state unit, and each grid-connected point unit also acquires parameter data required to be acquired by the grid-connected point state unit according to functions.
The new energy detection module comprises a power generation system total adding unit, a power generation map unit and a power generation summary table unit, wherein the power generation system total adding unit is used for performing total adding display on all distributed power supplies in an area, and the display area displays the total installed capacity of all the distributed power supplies, the proportion of various distributed power supplies, real-time output, the daily power generation amount, the total power generation amount and the carbon dioxide emission reduction amount of the various distributed power supplies; the power generation geographic map unit is used for marking the positions of all the distributed power supplies in operation or planning on a local map; the power generation summary table unit is used for generating a summary table of total installed capacity of all distributed power supplies in the region, the proportion of various distributed power supplies, real-time output, daily power generation amount, total power generation amount and carbon dioxide emission reduction amount of various distributed power supplies.
The application module comprises a load prediction unit, a load prediction unit and a load analysis unit, wherein the load prediction unit is used for realizing daily trend prediction, monthly trend prediction and historical data source trend prediction in a specified period of time of the load of various distributed power supplies in an area; the power generation prediction unit is used for realizing daily trend prediction, monthly trend prediction and historical data source trend prediction of the power generation amount of various distributed power supplies in the region; the feeder automation unit is used for realizing the feeder automation of the grid-connected points of various types of distributed power supplies in the area; the automatic voltage reactive power control unit is used for realizing automatic voltage reactive power control of various types of distributed power supplies in the region; the system comprises an economic operation control unit, a power supply management unit and a power supply management unit, wherein the economic operation control unit is used for realizing the economic operation of grid-connected points of various distributed power supplies in an area; and the distributed power source group control unit is used for realizing the collective control of all distributed power sources in the region.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a distributed generator access point electric energy quality evaluation system, includes the distributed generator module, its characterized in that: the distributed power supply module is connected with a new energy detection module, an application module, a grid-connected detection module and a scheduling regulation and control module, the new energy detection module is used for detecting the power generation capacity of the distributed power supply module, the application module is used for predicting and operating the distributed power supply module, the grid-connected detection module is used for monitoring the grid-connected points of the distributed power supply in an area, displaying the running state of each grid-connected point, the line of each grid-connected point connected to the power distribution network and the parameter of each grid-connected point, the scheduling regulation and control module is used for realizing the scheduling control of the distributed power supply module in the area and realizing the starting, stopping, grid-connected or off of each distributed power supply module, the grid-connected detection module and the scheduling regulation and control module are jointly connected with a master voltage detection sensor module, the master voltage detection sensor module is used for monitoring the active power of a load connected to the power distribution network bus in real time, the distributed power supply grid-connected module is used for grid-connected with a grid-connected upload, and the distributed power supply module is a public power grid;
the grid-connected point detection module is connected with a grid-connected point module, and the grid-connected point module is electrically connected with an electric energy quality monitoring unit, a grid-connected point frequency unit, a grid-connected point active power unit, a grid-connected point voltage and current unit, a grid-connected point state unit and a grid-connected point overload state data unit;
the power quality monitoring unit comprises a voltage deviation detection unit, a voltage fluctuation and flicker unit, a harmonic detection unit, a three-item unbalance detection unit and a temporary overvoltage and transient overvoltage detection unit.
2. The distributed power access point power quality assessment system of claim 1, wherein: the grid-connected point state unit comprises a grid-connected point accident state unit and a grid-connected point maintenance state unit.
3. The distributed power access point power quality assessment system of claim 1, wherein: the new energy detection module comprises a power generation system total adding unit, a power generation map unit and a power generation summary table unit, wherein the power generation system total adding unit is used for performing total adding display on all distributed power supplies in an area; the power generation geographic map unit is used for marking the positions of all distributed power supplies in operation or planning on a local map; and the power generation summary table unit is used for generating all the distributed power supply data summary tables in the region.
4. The distributed power access point power quality assessment system of claim 1, wherein: the application module comprises a load prediction module, a power generation prediction module, a feeder automation unit, an automatic voltage reactive power control unit, an economic operation control unit and a distributed power supply group control unit, wherein the load prediction module is used for realizing the trend prediction of the load of the distributed power supply in the region; the power generation prediction unit is used for realizing trend prediction of the power generation amount of the distributed power supply in the region; the feeder automation unit is used for realizing the feeder automation of a grid-connected point of the distributed power supply in the region; the automatic voltage reactive power control unit is used for realizing automatic voltage reactive power control of various types of distributed power supplies in the region; the economic operation control unit is used for realizing the economic operation of a grid connection point of the distributed power supply in the region; the distributed power source group control unit is used for realizing the collective control of all distributed power sources in the region.
5. The distributed power access point power quality assessment system of claim 1, wherein: the distributed power supply module is further connected with an on-site detection module, the on-site detection module comprises an environment monitoring module and a monitor module, and the monitor module is used for monitoring the state of the environment monitoring module.
6. The distributed power access point power quality assessment system of claim 5, wherein: the environment monitoring module comprises a temperature sensor, a humidity sensor, a wind sensor and an illumination sensor.
7. The distributed power access point power quality assessment system of claim 1, wherein: the distributed power supply module is a solar power generation device, a natural gas power generation device, a biomass power generation device, a wind power generation device, a geothermal power generation device, an ocean power generation device or a resource comprehensive utilization power generation device.
8. The distributed power access point power quality assessment system of claim 7, wherein: the resource comprehensive utilization power generation equipment is coal mine power generation equipment or gas power generation equipment.
9. The distributed power access point power quality assessment system of claim 1, wherein: and the distributed power supply module is also connected with a power detector.
10. The distributed power access point power quality assessment system of claim 1, wherein: and the distributed power supply grid-connected module is also provided with an electric energy quality detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211194674.0A CN115498689A (en) | 2022-09-29 | 2022-09-29 | Distributed power supply access point power quality assessment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211194674.0A CN115498689A (en) | 2022-09-29 | 2022-09-29 | Distributed power supply access point power quality assessment system |
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| CN101957396A (en) * | 2009-07-14 | 2011-01-26 | 黑龙江省电力科学研究院 | On-line monitoring device and method for voltage quality of electric power system |
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| CN104953622A (en) * | 2015-07-30 | 2015-09-30 | 国网上海市电力公司 | Distributed power connection monitoring system |
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| CN101957396A (en) * | 2009-07-14 | 2011-01-26 | 黑龙江省电力科学研究院 | On-line monitoring device and method for voltage quality of electric power system |
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| CN103236727A (en) * | 2013-04-27 | 2013-08-07 | 国家电网公司 | Intelligent equipment for controlling sequential charging and discharging of storage battery according to power generation capacity of new energy sources |
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